The final battle
In the final few minutes of the film, Sonic and Shadow team up, use the Master Emerald to take on their super forms, and save the world from cataclysmic destruction. This also occurs in Sonic Adventure 2, but while the movies have the two face an army of Gerald’s robots, the speedy hedgehogs fight something else as a final boss in the game. As a last-ditch effort to destroy the world, The Biolizard, the prototype for the Ultimate Lifeform, fuses with the Space Colony Ark and attempts to keep it on a collision course toward the planet. The Biolizard isn’t mentioned in the movie and seemingly doesn’t exist in the film universe, so while the final battle still has most of the elements that matter, our heroes are squarely focused on fighting Gerald in the climax.
